Mercurial > repos > IBBoard
annotate Preferences.cs @ 120:780169621672
* Remove rogue print statement
| author | IBBoard <dev@ibboard.co.uk> |
|---|---|
| date | Tue, 06 Nov 2012 20:51:49 +0000 |
| parents | 0f88d32b22cc |
| children |
| rev | line source |
|---|---|
| 16 | 1 // This file (Preferences.cs) is a part of the IBBoard library and is copyright 2009 IBBoard. |
| 2 // | |
| 3 // The file and the library/program it is in are licensed under the GNU LGPL license, either version 3 of the License or (at your option) any later version. Please see COPYING.LGPL for more information and the full license. | |
| 4 | |
| 37 | 5 using System; |
| 6 using System.Collections; | |
| 7 using System.IO; | |
| 8 using System.Xml; | |
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9 using System.Reflection; |
| 37 | 10 using IBBoard.IO; |
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11 |
| 37 | 12 //TODO: Add import/export |
| 13 namespace IBBoard | |
| 14 { | |
| 15 /// <summary> | |
| 16 /// Summary description for Preferences. | |
| 17 /// </summary> | |
| 18 public class Preferences | |
| 19 { | |
| 20 private static Type stringType = typeof(string); | |
| 21 private static Type hashtableType = typeof(Hashtable); | |
| 22 private Hashtable htGlobal; | |
| 23 private Hashtable htLocal; | |
| 24 | |
| 25 private string app; | |
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26 private bool modified = false; |
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27 |
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28 |
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29 public Preferences(string appName) |
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30 { |
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31 app = appName; |
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32 LoadPreferences(); |
| 37 | 33 } |
| 34 | |
| 35 private void LoadPreferences() | |
| 36 { | |
| 37 htGlobal = new Hashtable(); | |
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38 htLocal = new Hashtable(); |
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39 |
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40 string globalPath = Path.Combine(Constants.ExecutablePath, app + "Pref.xml"); |
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41 |
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42 if (File.Exists(globalPath)) |
| 37 | 43 { |
| 44 XmlDocument xmld = new XmlDocument(); | |
| 45 xmld.Load(globalPath); | |
| 46 XmlNodeList nl = xmld.LastChild.ChildNodes; | |
| 47 XmlNodeList nlHash; | |
| 48 MethodInfo m; | |
| 49 Type t; | |
| 50 Hashtable htTemp; | |
| 51 | |
| 52 if (nl == null || nl.Count==0) | |
| 53 { | |
| 54 throw new InvalidFileException("Preference file "+globalPath+" did not contain any preferences"); | |
| 55 } | |
| 56 | |
| 57 for (int i = 0; i<nl.Count; i++) | |
| 58 { | |
| 59 t = Type.GetType(nl[i].Attributes["type"].Value, true); | |
| 60 | |
| 61 if (t!=stringType) | |
| 62 { | |
| 63 if (t==hashtableType) | |
| 64 { | |
| 65 htTemp = new Hashtable(); | |
| 66 nlHash = nl[i].ChildNodes; | |
| 67 | |
| 68 for (int j = 0; j<nlHash.Count; j++) | |
| 69 { | |
| 70 if (nlHash[j].NodeType.GetType()==typeof(XmlElement)) | |
| 71 { | |
| 72 t = Type.GetType(nlHash[j].Attributes["type"].Value, true); | |
| 73 m = t.GetMethod("Parse", new Type[]{stringType}); | |
| 74 htTemp[nlHash[j].Attributes["key"].Value] = m.Invoke(null, new object[]{nlHash[j].InnerText}); | |
| 75 } | |
| 76 } | |
| 77 | |
| 78 htGlobal[nl[i].Attributes["id"].Value] = htTemp; | |
| 79 } | |
| 80 else if (t.IsEnum) | |
| 81 { | |
| 82 htGlobal[nl[i].Attributes["id"].Value] = Enum.Parse(t, nl[i].InnerText, true); | |
| 83 } | |
| 84 else | |
| 85 { | |
| 86 m = t.GetMethod("Parse", new Type[]{stringType}); | |
| 87 htGlobal[nl[i].Attributes["id"].Value] = m.Invoke(null, new object[]{nl[i].InnerText}); | |
| 88 } | |
| 89 } | |
| 90 else | |
| 91 { | |
| 92 htGlobal[nl[i].Attributes["id"].Value] = nl[i].InnerText; | |
| 93 } | |
| 94 } | |
| 95 | |
| 96 LoadLocalPreferences(); | |
| 97 } | |
| 98 else | |
| 99 { | |
| 100 throw new FileNotFoundException("Could not find default preferences at "+globalPath); | |
| 101 } | |
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102 } |
| 37 | 103 |
| 104 private void LoadLocalPreferences() | |
| 105 { | |
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106 string path = Path.Combine(Constants.UserDataPath, "preferences.xml"); |
| 37 | 107 |
| 108 if (File.Exists(path)) | |
| 109 { | |
| 110 XmlDocument xmld = new XmlDocument(); | |
| 111 xmld.Load(path); | |
| 112 XmlNodeList nl = xmld.LastChild.ChildNodes; | |
| 113 XmlNodeList nlHash; | |
| 114 MethodInfo m; | |
| 115 Type t; | |
| 116 Hashtable htTemp = new Hashtable(); | |
| 117 | |
| 118 nl = xmld.LastChild.ChildNodes; | |
| 119 | |
| 120 for (int i = 0; i<nl.Count; i++) | |
| 121 { | |
| 122 if (!htGlobal.ContainsKey(nl[i].Attributes["id"].Value)) | |
| 123 { | |
| 124 throw new InvalidFileException("User preferences file contains a value for key \""+nl[i].Attributes["id"].Value+"\" which is not contained in the main preferences"); | |
| 125 } | |
| 126 | |
| 127 t = Type.GetType(nl[i].Attributes["type"].Value, true); | |
| 128 if (t!=stringType) | |
| 129 { | |
| 130 if (t==hashtableType) | |
| 131 { | |
| 132 htTemp = new Hashtable(); | |
| 133 nlHash = nl[i].ChildNodes; | |
| 134 Hashtable htTempInner = new Hashtable(); | |
| 135 | |
| 136 for (int j = 0; j<nlHash.Count; j++) | |
| 137 { | |
| 138 if (nlHash[j].NodeType==XmlNodeType.Element) | |
| 139 { | |
| 140 t = Type.GetType(nlHash[j].Attributes["type"].Value, true); | |
| 141 m = t.GetMethod("Parse", new Type[]{stringType}); | |
| 142 htTempInner[nlHash[j].Attributes["key"].Value] = m.Invoke(null, new object[]{nlHash[j].InnerText}); | |
| 143 } | |
| 144 } | |
| 145 | |
| 146 htTemp[nl[i].Attributes["id"].Value] = htTempInner; | |
| 147 } | |
| 148 else if (t.IsEnum) | |
| 149 { | |
| 150 htTemp[nl[i].Attributes["id"].Value] = Enum.Parse(t, nl[i].InnerText, true); | |
| 151 } | |
| 152 else | |
| 153 { | |
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154 m = t.GetMethod("Parse", new Type[]{stringType}); |
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155 |
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156 if (m!=null) |
| 37 | 157 { |
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158 htTemp[nl[i].Attributes["id"].Value] = m.Invoke(null, new object[]{nl[i].InnerText}); |
| 37 | 159 } |
| 160 } | |
| 161 } | |
| 162 else | |
| 163 { | |
| 164 htTemp[nl[i].Attributes["id"].Value] = nl[i].InnerText; | |
| 165 } | |
| 166 } | |
| 167 | |
| 168 htLocal = htTemp; | |
| 169 } | |
| 170 } | |
| 171 | |
| 172 public void ReloadPreferences() | |
| 173 { | |
| 174 htLocal.Clear(); | |
| 175 LoadLocalPreferences(); | |
| 176 } | |
| 177 | |
| 178 public object this[string key] | |
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179 { |
| 37 | 180 get { return this[key, true]; } |
| 181 | |
| 182 set | |
| 183 { | |
| 184 if (!htGlobal.ContainsKey(key)) | |
| 185 { | |
| 186 throw new InvalidOperationException("Preference must already exist in the Global Preferences"); | |
| 187 } | |
| 188 | |
| 189 if (htGlobal[key].GetType()!=value.GetType()) | |
| 190 { | |
| 191 throw new InvalidOperationException("Preferences must be set with an object of the same type as the existing preference"); | |
| 192 } | |
| 193 | |
| 194 if (value is Hashtable) | |
| 195 { | |
| 196 throw new InvalidOperationException("Hashtables in Preferences cannot be set, they can only be added to or removed from."); | |
| 197 } | |
| 198 | |
| 199 if (htGlobal[key].Equals(value)) | |
| 200 { | |
| 201 if (htLocal.ContainsKey(key)) | |
| 202 { | |
| 203 htLocal.Remove(key); | |
| 204 modified = true; | |
| 205 } | |
| 206 } | |
| 207 else if (!((htLocal[key]==null && value==null) || value.Equals(htLocal[key]))) | |
| 208 { | |
| 209 htLocal[key] = value; | |
| 210 modified = true; | |
| 211 } | |
| 212 //else nothing actually needs modifying | |
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213 } |
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214 } |
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215 |
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216 public object this[string key, bool errorOnNoVal] |
| 37 | 217 { |
| 218 get | |
| 219 { | |
| 220 if (htLocal.ContainsKey(key)) | |
| 221 { | |
| 222 return htLocal[key]; | |
| 223 } | |
| 224 else if (htGlobal.ContainsKey(key)) | |
| 225 { | |
| 226 if (htGlobal[key] is Hashtable) | |
| 227 { | |
| 228 htLocal[key] = ((Hashtable)htGlobal[key]).Clone(); | |
| 229 return htLocal[key]; | |
| 230 } | |
| 231 else | |
| 232 { | |
| 233 return htGlobal[key]; | |
| 234 } | |
| 235 } | |
| 236 else if (errorOnNoVal) | |
| 237 { | |
| 238 throw new InvalidOperationException("Key \""+key+"\" was not associated with a preference value"); | |
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239 } |
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240 |
| 37 | 241 return null; |
| 242 } | |
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243 } |
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244 |
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245 public bool GetBooleanProperty(string key) |
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246 { |
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247 object obj = this[key, false]; |
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248 bool val = false; |
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249 |
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250 if (obj is bool) |
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251 { |
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252 obj = (bool)obj; |
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253 } |
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254 |
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255 return val; |
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256 } |
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257 |
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258 public string GetStringProperty(string key) |
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259 { |
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260 object obj = this[key, false]; |
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261 string str = null; |
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262 |
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263 if (obj is String) |
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264 { |
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265 str = (String)obj; |
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266 } |
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267 |
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268 return str; |
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269 } |
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270 |
| 37 | 271 //public String |
| 272 | |
| 273 public bool IsModified() | |
| 274 { | |
| 275 return modified; | |
| 276 } | |
| 277 | |
| 278 public void Save() | |
| 279 { | |
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280 string prefPath = Path.Combine(Constants.UserDataPath, "preferences.xml"); |
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281 |
| 37 | 282 if (htLocal.Count>0) |
| 283 { | |
| 284 XmlDocument xmld = new XmlDocument(); | |
| 285 xmld.LoadXml("<?xml version=\"1.0\" encoding=\"ISO-8859-1\"?>"+ | |
| 286 "<!DOCTYPE prefs["+ | |
| 287 "<!ELEMENT preferences (preferece*)> "+ | |
| 288 "<!ELEMENT preference (CDATA|prefsub)> "+ | |
| 289 "<!ELEMENT prefsub (CDATA)> "+ | |
| 290 "<!ATTLIST preference id ID #REQUIRED>"+ | |
| 291 "<!ATTLIST preference type CDATA #REQUIRED>"+ | |
| 292 "<!ATTLIST prefsub key CDATA #REQUIRED>"+ | |
| 293 "<!ATTLIST prefsub type CDATA #REQUIRED>"+ | |
| 294 "]>"+"<preferences></preferences>"); | |
| 295 XmlNode xmln = xmld.LastChild; | |
| 296 XmlNode pref; | |
| 297 XmlAttribute attr; | |
| 298 XmlNode prefSub; | |
| 299 XmlAttribute attrSub; | |
| 300 object o; | |
| 301 Hashtable htTemp; | |
| 302 Hashtable htGlobalTemp; | |
| 303 | |
| 304 foreach (string key in htLocal.Keys) | |
| 305 { | |
| 306 pref = xmld.CreateNode(XmlNodeType.Element, "preference",""); | |
| 307 attr = xmld.CreateAttribute("id"); | |
| 308 attr.Value = key; | |
| 309 pref.Attributes.Append(attr); | |
| 310 attr = xmld.CreateAttribute("type"); | |
| 311 o = htLocal[key]; | |
| 312 | |
| 313 attr.Value = o.GetType().AssemblyQualifiedName; | |
| 314 | |
| 315 if (o.GetType().ToString() == "System.Collections.Hashtable") | |
| 316 { | |
| 317 htTemp = (Hashtable)o; | |
| 318 htGlobalTemp = (Hashtable)htGlobal[key]; | |
| 319 | |
| 320 foreach(object subkey in htTemp.Keys) | |
| 321 { | |
| 322 if (!htGlobalTemp.ContainsKey(subkey) || !htGlobalTemp[subkey].Equals(htTemp[subkey])) | |
| 323 { | |
| 324 prefSub = xmld.CreateNode(XmlNodeType.Element, "prefsub", ""); | |
| 325 attrSub = xmld.CreateAttribute("key"); | |
| 326 attrSub.Value = subkey.ToString(); | |
| 327 prefSub.Attributes.Append(attrSub); | |
| 328 attrSub = xmld.CreateAttribute("type"); | |
| 329 attrSub.Value = htTemp[subkey].GetType().AssemblyQualifiedName; | |
| 330 prefSub.Attributes.Append(attrSub); | |
| 331 prefSub.InnerText = htTemp[subkey].ToString(); | |
| 332 pref.AppendChild(prefSub); | |
| 333 } | |
| 334 } | |
| 335 } | |
| 336 else | |
| 337 { | |
| 338 pref.InnerText = o.ToString(); | |
| 339 } | |
| 340 | |
| 341 pref.Attributes.Append(attr); | |
| 342 xmln.AppendChild(pref); | |
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343 } |
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344 |
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345 if (!Directory.Exists(Constants.UserDataPath)) |
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346 { |
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347 Directory.CreateDirectory(Constants.UserDataPath); |
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348 } |
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349 |
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350 xmld.Save(prefPath); |
| 37 | 351 } |
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352 else if (File.Exists(prefPath)) |
| 37 | 353 { |
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354 File.Delete(prefPath); |
| 37 | 355 } |
| 356 | |
| 357 modified = false; | |
| 358 } | |
| 359 } | |
| 360 } |